tools: Suppress valgrind errors during exit()
tools: Suppress valgrind errors during exit()

Invalid free() / delete / delete[] / realloc()
  at 0x4C2BDEC: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
  by 0x5EB043B: __libc_freeres (in /lib/x86_64-linux-gnu/libc-2.19.so)
  by 0x4A256BC: _vgnU_freeres (in /usr/lib/valgrind/vgpreload_core-amd64-linux.so)
  by 0x5D864CA: __run_exit_handlers (exit.c:97)
  by 0x5D86554: exit (exit.c:104)
  by 0x5D6BECB: (below main) (libc-start.c:321)
Address 0x61093c0 is 0 bytes inside data symbol "noai6ai_cached"

Closes #3290
Reviewed-by: Marius Vollmer <bb11c6e942c5cc765df5f04da146b3198127a7a3@redhat.com>

stefwalter/cockpit,SotolitoLabs/cockpit,xhad/cockpit,larskarlitski/cockpit,arilivigni/cockpit,jscotka/cockpit,harishanand95/cockpit,larsu/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,jscotka/cockpit,vanloswang/cockpit,FireDrunk/cockpit,vanloswang/cockpit,larsu/cockpit,cockpituous/cockpit,sgallagher/cockpit,harishanand95/cockpit,dperpeet/cockpit,andreasn/cockpit,stefwalter/cockpit,arilivigni/cockpit,sgallagher/cockpit,moraleslazaro/cockpit,xhad/cockpit,petervo/cockpit,petervo/cockpit,harishanand95/cockpit,mvollmer/cockpit,sgallagher/cockpit,Scribery/cockpit,garrett/cockpit,andreasn/cockpit,mvollmer/cockpit,mareklibra/cockpit,mareklibra/cockpit,harishanand95/cockpit,moraleslazaro/cockpit,FireDrunk/cockpit,cockpit-project/cockpit,xhad/cockpit,vanloswang/cockpit,arilivigni/cockpit,larsu/cockpit,SotolitoLabs/cockpit,Scribery/cockpit,SotolitoLabs/cockpit,cockpituous/cockpit,michalskrivanek/cockpit,stefwalter/cockpit,stefwalter/cockpit,matobet/cockpit,deryni/cockpit,dperpeet/cockpit,michalskrivanek/cockpit,xhad/cockpit,FireDrunk/cockpit,dperpeet/cockpit,sgallagher/cockpit,Scribery/cockpit,cockpit-project/cockpit,arilivigni/cockpit,stefwalter/cockpit,petervo/cockpit,larskarlitski/cockpit,harishanand95/cockpit,martinpitt/cockpit,mareklibra/cockpit,jscotka/cockpit,FireDrunk/cockpit,xhad/cockpit,arilivigni/cockpit,mareklibra/cockpit,petervo/cockpit,moraleslazaro/cockpit,deryni/cockpit,garrett/cockpit,jscotka/cockpit,deryni/cockpit,larskarlitski/cockpit,dperpeet/cockpit,xhad/cockpit,larskarlitski/cockpit,andreasn/cockpit,matobet/cockpit,larsu/cockpit,larskarlitski/cockpit,matobet/cockpit,garrett/cockpit,martinpitt/cockpit,garrett/cockpit,sgallagher/cockpit,cockpituous/cockpit,mareklibra/cockpit,vanloswang/cockpit,harishanand95/cockpit,dperpeet/cockpit,jscotka/cockpit,andreasn/cockpit,martinpitt/cockpit,mareklibra/cockpit,michalskrivanek/cockpit,cockpituous/cockpit,vanloswang/cockpit,FireDrunk/cockpit,andreasn/cockpit,arilivigni/cockpit,xhad/cockpit,michalskrivanek/cockpit,michalskrivanek/cockpit,Scribery/cockpit,mvollmer/cockpit,michalskrivanek/cockpit,cockpituous/cockpit,petervo/cockpit,Scribery/cockpit,arilivigni/cockpit,deryni/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,sgallagher/cockpit,moraleslazaro/cockpit,matobet/cockpit,cockpituous/cockpit,mvollmer/cockpit,sgallagher/cockpit,stefwalter/cockpit,deryni/cockpit,cockpit-project/cockpit,Scribery/cockpit,matobet/cockpit,petervo/cockpit,michalskrivanek/cockpit,jscotka/cockpit,andreasn/cockpit,vanloswang/cockpit,deryni/cockpit,petervo/cockpit,larsu/cockpit,matobet/cockpit,harishanand95/cockpit,cockpit-project/cockpit,garrett/cockpit,deryni/cockpit,larsu/cockpit,dperpeet/cockpit,larskarlitski/cockpit,vanloswang/cockpit,mvollmer/cockpit,martinpitt/cockpit,larskarlitski/cockpit,moraleslazaro/cockpit,dperpeet/cockpit,andreasn/cockpit,SotolitoLabs/cockpit,cockpit-project/cockpit,SotolitoLabs/cockpit,martinpitt/cockpit,Scribery/cockpit,SotolitoLabs/cockpit,mareklibra/cockpit